Warp stop motion



March 23 192a. 1,571,711

A. A. GORDON WARP STOP uorzou Filed June 25, 1924 Patented Mar. 23, 1926.

UNITED stares Parent s.

ALBERT A. Gonnon, or wononsrnn, MASSACHUSETTS, assrsn'on ro GROMPTON & KNOWLES LOOM worms, or wononsrnn, raessaorinsnrrs, a oonronarron or MASSACHUSETTS.

WARP S'IOIP MOTION.

' To all whom it may concern:

Be it known that I, ALBERT A. GoRnoN, a citizen of the United States, residing at lVorcester, in the county of WVorcester and State of Massachusetts, have inventet a new and useful Warp Stop Motion, of whlch the following is a specification.

This invention relates to a warp stop motion of the type shown in the prior patent to Holmes No. 1362,5 18, issued July 24:, 1923.v My invention relates more particularly to a novel and simple arrangement for releasing the warp stop motionfrom the actuator as the off movement of the ship per is completed.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claim.

A preferred form of the invention is shown in the drawings in which Fig. 1 is an end view of a stop motion embodying my improvements;

Fig. 2 is a side elevation thereof, and

Figs. 3 and 1 are end views similar to Fig. 1 but showing the parts in different successive positions,

Referring to the drawings, the stop 1110- tion shown therein is in general substantially similar to the stop motion shown in the patent to Holmes, above noted, and includes end stands or brackets 10 on which a plurality of detector bars 11 are mounted for oscillating movement. Separator bars 12 extend lengthwise of the stop motion from side to side of the loom and parallel to the detector bars 11. Stop wires V (Fig. 2) are suspended by the warp threads, with the detector bars 11 extending through openings therein. The-wires N are sepa rated by thcbars 12 into a series of separate banks, the mechanism shown being designed for four banks of drop wires.

The detector bars 11 are mounted in hubs 13 (Fig. 2) having arms 141 (Fig. 1) connected at their lower ends by a link 15 so that all of the arms and detector bars may be oscillated in unison. One of the hubs 13 is also provided with an upwardly extending arm 16 which is yieldingly connected by a U-shaped link 17 to an actuator 18 pivoted on a stud 19 fixed in the stand 10. The actuator 18 is connected by a link 20 to a cam on the bottom shaft of the loom (not shown) or to some other suitable source of power by which the actuator regularly oscillated.

An arm 21 is also pivoted on the stud l9 and is connected by a link 22 to a knock-off mechanism by which a shipper may be released and the loom may be stopped. A pawl 23 is pivoted at 24 on the arm 21 and is normally positioned for engagement by a lug or shoulder 25 on the actuator 18. When the lug 25 engages the pawlv 23, the arm 21 is swung to the left in Fig. 1 and acts through the link 22 to release the shipper and stop the loom.

A stud 26 (Fig. 2) is fixedto one of the arms 14:, preferably at the left hand end of the series, and engages a plate 27 adjust ably secured on arms 28 and 29 formed as a part of the pawl 23. Adjusting screws 30 are provided for adjustably securing the plate 27 on the arms.

When the drop wires W are all in raised position, the vibrator bars 11 oscillate freely and, on each upward movement of the actuator link 20, the arms 14 are swung to the left in Fig. 1, causingthe stud 26 to engage the plate 27 and depress the pawl 23 so that the lug 25 passes freely thereover. 7

Then, however, a fallen drop wire W prevents oscillation of one of the detector bars 11, the arms 14 are held in the position. shown in F ig. 1 and the pawl 23 is engaged by the lug 25. Such engagement causes the arm 21 to be swung to the left and is effective through the link 22 to stop the loom.

For a more complete description of the parts of the stop motion above described and the method of operation thereof, reference made to the prior patent to Holmes, above noted. The mechanism thus far described is fully shown therein and in itself forms no part of my present invention, which relates particularly to improved means forreleasing the pawl 23 from the shoulder 25'as the arm 21 approaches its limit of releasing or 100m stopping movement 82 and the point of the pawl 23 is depressed to clear the lug 25, thus releasing the arm 21, which may then swing to the right to the position shown in Fig. 4i.

The disengagement of the projection 31 from the abutment 32 takes place just as the shipper lever approaches its limit of releasing movement. The object of thus releasing the pawl 23 from the lug of the actuator is to disengage the knock off mechanism from the actuator 18, so that the shipper may be free for use in again starting the loom. -lVith the construction as shown, it is necessary for the actuator to make a full idle or rearward stroke before it can again engage the pawl 23 to stop the loom and before such engagement can occur the stud 26 will engage the pawl and move it out of the path of the actuator, provided the broken warp thread has been duly repaired and the fallen warp wire has been raised. 7

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein shown and described otherwise than as set 'forth in the claim, but what I claim is In a warp stop motion, a regularly moving actuator traveling in a fixed path, a pivotally mounted knockoff lever, a pawl pivoted to the lever and normally lying in the path of theactuator, a fixed abutment, means to move the pawl out of the path of the actuator under normal conditions at the beginning ot'the' stroke of the actuator and to permit the pawl to remain in the path of the actuator at warp fault to cause said lever to be moved with the actuator, the movement of said lever with the actuator carrying the pawl against the abutment to move the pawl out of the path of the actuator as the latter nears the end of its working stroke.

In testimony whereof I have hereunto affixed my signature.

ALBERT A. GORDON. 

